问题 问答题 简答题

油品具有腐蚀性的原因有哪些?

答案

参考答案:1.化学腐蚀,主要是油品中的硫化物、酸性物腐蚀管线;

2.大气腐蚀,大气中的气体进入油品,形成电解质溶液,造成腐蚀。

写作题

书面表达 (满分25分)

假定你是一名中学生,名叫王林,写一封建议信给21st Century的编辑,反映目前滥养宠物的问题。你认为宠物过多,噪音扰民;污染环境;你周围许多人尤其是小孩都曾经被吓到或咬伤;甚至会导致某些疾病的传播,所以你希望得到媒体的关注和支持。

注意:1、词数120左右

2、短文开头已给出,不计入总词数。

Dear editor,

I’m sorry to occupy your precious time ,but I really want to tell you something about he problem of some people keeping too many pets nowadays.

                                                                              

                                                                              

                                                                              

                                                                                                                                                             

                                                                              

                                                                              

                                                                              

Yours truly

wang lin

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